Channeling-machine.



A. H. PRENZBL.

GHANNELING MACHINE.

APPLICATION FILED APR.20, 1911.

Patented June 25, 1912.

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tlNlTED STATE PATENT OFFICE.

ADAM H. PRENZEL, OF HALIFAX, PENNSYLVANIA, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

CI-IANNELING-MACHINE.

Patented June 25, 1912.

Application filed April 20, 1911. Serial No. 622,227.

To all whom it may concern:

Be it known that I, ADAM H. PnnNznL, a citizen of the United States, residing at Halifax, in the county of Dauphin and State of Pennsylvania, have invented cer tain new and useful Improvements in ChannelingMachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will onable others skilled in the art to which it a-ppertains to make and use the same.

This invention relates to channeling machines for turn work adapted particularly to making soles having the characteristics of those employed in the manufacture of underwedge childrens turn shoes, such as illustrated and described in the inventors United States Letters Patent No. 967,053, dated Aug. 9, 1910.

In making turn shoes the sole is prepared by providing a marginal channel as in the making of a welt insole and by providing outside of said channel a parallel marginal shoulder. In one type of turn shoe soles, the channel and the shoulder extend completely around the sole while in another type one or both of said cuts may extend only to the shank. In making the underwedge shoe illustrated in the patent hereinbefore referred to by the method described in the inventors United States Letters Patent No. 960,234, dated May 31, 1910, a continuous channel is formed in the margin of the sole on its flesh side but the shoulder runs only to a point at each side of the shoe about opposite the breast line, the margin of the heel seat of the sole being beveled instead of shouldered. In performing the channeling and shouldering operations, which usually occur simultaneously by means of two knives fitted in one machine, the sole is laid with its grain side upon a suitable support and is advanced through the machine by suitable means.

As is well known to those skilled in the art, in a turn shoe the thickness of the edge of the sole, which is exposed in the finished shoe, should be uniform and, therefore, the shoulder knife is adjusted and fitted in the machine to make its cutby measuring the desired thickness of edge from the grain side of the sole. To this end the edge presser foot, ordinarily provided for the edge or shoulder knife, is yieldingly mounted independently of the block which carries the shoulder knife so that it will yield to any unevenness of the flesh side of the sole upon which it bears and thus while performing its function does not disturb the position of the shoulder knife relative to the grain side of the sole. On the other hand, the channel presser foot for the channel knife is mounted on the channel block in fixed relation to the channel knife so that if it is raised by an unevenness on the flesh side of the sole, it will raise the channel knife with it and thus preserve an even thickness of channel flap as is desirable.

Means have heretofore been provided in turn channeling machines for lifting the edge or shoulder knife from its operative aosition at the will of the operator during the feed of the sole through the machine so that the shoulder cut will not extend entirely around the periphery of the sole but in such prior machines, the edge presser foot remains in contact with the flesh side of the sole during the continued cutting of the channel. In the underwedge type of sole, as will be seen by reference to the patents hereinbefore referred to, the heel portion is considerably thicker than the forepart. If, when the shoulder knife is lifted from operative position at the breast line, the edge presser foot is allowed to remain in contact with the thickened heel end of the sole, its increased pressure upon the sole acts to retard the feed. It is desirable, therefore, that the edge presser foot be lifted from operative position at the same time that the edge or shoulder knife is lifted so that the channeling around the heel seat may proceed properly.

The object of the present invention is to provide a turn channeling machine which will be eflicient in operating upon soles having the characteristics above described.

In accordance with this object, the invention comprises the provision of means in a turn channeling machine for lifting both the edge knife and edge presser foot out of operating position at the will of the operator. In the best form of the invention atpresent known to the inventor, means has been provided, in a machine already having provision for lifting the edge knife out of operating position, for connecting the inclependently mounted, spring pressed edge presser foot to the edge knife lifting means at the will of the operator.

With the above object in view and such others as may hereinafter appear, the invention comprises the features and combinations of parts hereinafter described and particularly pointed out in the appended claims.

The invention, as applied to a turn channeling machine of the type illustrated and described in British Letters Patent No. 3986, dated Feb. 17, 1910, to Alfred J. Boult, is illustrated in the accompanying drawings, in which:

Figure 1 is a rear elevation of the machine and Fig. 2 is a fragment of the head illustrating the improvements in side elevation.

The machine head having the operating parts for formingthe shoulder and channel cuts in the sole comprises, as illustrated in the drawings, a U-frame 1 mounted upon a suitable base of convenient height. The lower arm of the frame carries a sole supporting table 2 mounted upon a vertically movable support 4 which slides in a guideway 6 and which may be lowered by means of suitable connections from a treadle (not shown) attached to a treadle rod 7. The

7 upper arm of the frame supports a carrier 8 mounted upon a pair of cone bearings 10 which permit a swinging movement of the carrier in the line of feed. Within the carrier are a pair of vertical slides 12 and 14 (Fig. 2). The slide 12 carries at its lower end an edge knife block 15 having mounted therein an edge knife, as illustrated a shoulder knife, 16, the distance of said knife above the surface of the sole supporting ta ble 2 being determined by a pair of nuts 17 at the upper end of the slide bearing upon the carrier. By an adjustment of the nuts 17 the edge thickness of the sole being operated upon is determined, as such an adjustment varies the distance of the knife 16 from the surface of the table, or, in other words, from the grain side of the sole which rests upon the table. The slide 14 carries at its lower end an outwardly projecting toe 18 on which is mounted a channel knife block 19 carrying a channel knife 20. Both of the slides 12 and 14 are spring pressed toward the sole, the slide 12 by means of a comparatively heavy spring 21 and the slide 14 by means of a light spring 22. In advance of the channel and edge knives, there is provided a foot retainer, or hold-down, 24 which, by suitable mechanism mounted on the forward end of the driving shaft 25, is given a vertical reciprocatory movement in timed relation to the oscillations of the carrier 8. The carrier 8 is oscillated by means of suitable connections to a cam groove in one face of the cam disk 26 mounted on, and rotated by, the shaft The channel knife 20 is provided with an adjustable channel presser foot 28 which is mounted on the channel knife block 19 in t usual manner and is preliminarily adjusted so as to determine the depth of cut to be made by the channel knife. The edge knife is provided with an edge presser foot 30 which is adjustably mounted upon a toe 32 projecting from the lower end of a vertically movable slide 34 parallel to the edge knife slide and guided beneath gibs 35 secured to the outer face of the face plate 9 which retains the slides 12 and 14 within the carrier 8. The slide 34 is provided with a lug 36 through which is threaded thelower end of a pin 38 the upper end of which is passed through a second lug 40 projecting from the face plate 9. The pin 38 is held in place by nuts (see Fig. 1) threaded upon its ends and bearing upon the lugs. The portion of the pin between the lugs is surrounded by a coiled spring 42, the usual means being provided for adjusting the strength of this spring. The edge presser foot 30 is thus carried by a vertically moving slide which is yieldingly supported and which is also mounted independently of the slide 12 which carries the shoulder knife. Vith such a construction the coiled spring 42 will permit the edge presser foot to yield vertically independently of the shoulder knife although the presser foot and knife are both mounted on the oscillating carrier 8. In the operation of the machine the feeding of the sole is accomplished by means of the presser feet gripping the sole and carrying it forward during one stroke of the oscillating carrier 8, the foot retainer 24 at this time being raised from the sole thus leaving it free to be moved. The channel and shoulder cuts are made on the return stroke of the carrier, the foot retainer at this time being down clamping the sole against the work table and holding it from movement, the presser feet at this time merely dragging over the surface of the sole.

All of the parts just described may be, and preferably are, the same as those illustrated and described in the British patent to Alfred J. Boult, hereinbefore referred to, to which patent reference may be had for a full disclosure of the construction and operation of the machine.

As illustrated, but not described in said British patent, the slide 12 has projecting rearwardly from its upper end and passing through a suitable elongated opening in the channel knife slide 14, a pin 45 the underside of which is engaged by the free end of a crank arm 46 mounted upon a horizontal rock shaft 47 j ournaled in the upper arm of the frame 1. The rock shaft also carries a second arm 48 (see dotted lines) from which depends a treadle rod 49 having connected thereto a suitable treadle (not shown).

vl/Vith the construction here-inbefore described, it is possible to stop the shouldering operation at the will of the operator by pressing the treadle connected to the rod 49 which, by rocking the arm 46, lifts the pin 45 and with it the slide 12 which carries the knife. Owing to the construct-ion and mounting of the edge presser foot, this part is unaffected by the lifting of the edge knife and will remain in contact with the sole unless means is provided for connecting it to the knife lifting mechanism. Such means will now be described.

In the embodiment of the invention illustrated in the drawings there is mounted at the upper end of the pin 38 carried by the edge presser foot slide, a plate 50 having a slot through which projects the pin 45 carried by the edge knife slide 12. The plate 50 is provided at its lower end with a horizontal lug 51 having a hole through which the upper end of the pin 38 is passed and the plate secured to the pin by clamping the lug between the nuts at the upper end of the pin (see Fig. 2). By means of this arrangement, the plate 50 is connected to the edge presser foot slide and moves with that slide. At the upper end of the plate 50 there is pivotally mounted a locking piece, or connector, 52 provided with a surface 53 for engaging the upper side of the pin 45 in one position of the connector, and with a second surface 54 which, when the connect-or handle 55 is moved downward, is brought into substantial coincidence with the upper end of the slot in the plate. When the connector 52 has been adjusted to the position shown in Fig. 1, it is obvious that an upward pressure upon the pin 45, by means of the crank arm 46 to lift the shoulder knife, will act through the connecto-r and the plate 50 to lift the edge presser foot slide and with it the edge presser foot. Thus if the work being operated upon is such that it is desirable to lift the shoulder knife and edge presser foot simultaneously from the work, it is merely necessary to maintain the connector 52 in the position shown in Fig. 1. If, however, the work being operated on is such that it is unnecessary, or not desired, to lift the edge presser foot when the shoulder knife is lifted, theconnector 52 may be adjusted to a position with the surface 54 in coincidence with the upper end of the slot in the plate 50 and while in this position, obviously the edge presser foot will be unaffected by an upward movement of the pin 45 in lifting the shoulder knife slide. It should be noted that in the construction described the location of the connector, at the upper sideof the pin 45, permits the edge presser foot to yield at all times relatively to the shoulder knife and thus properly perform its function while the shoulder out is being made.

The position of the edge presser foot at the forward side of the shoulder knife is such that it is difficult, when first placing work in the machine, to properly adjust the two knives for thickness of between substance, by means of the adjustment for this purpose described in said British patent, unless the edge presser foot is lifted from the sole so as to permit the operator to see the relative position of the two knives. To provide means for lifting the edge presser foot at this time without lifting the shoulder knife, thelug 51 at the lower end of the plate 50 is provided with a side extension 56 (Fig. 1) and the lug 40 extending from the face plate 9 is provided at one side with a pivoted handle 57 having an eccentric head 58 adapted to bear upon the underside of the extension. By throwing the handle 57 down, the eccentric head 58 operates upon the extension 56 to lift the edge presser foot slide and raise the edge presser foot from the sole. After the desired adjustment of the channel and shoulder knives has been effected and preparatory to starting the machine, the handle 57 is thrown into its upward position and the edge presser foot allowed to descend into its op erating position upon the sole.

Broadly considered the invention herein set forth is not limited to use with the par ticular type of turn channeling machine hereinbefore described and it should be distinctly understood that, except as specifically defined in the claims, the invention is not limited in scope to use in that particular type of turn channeling machines nor, in fact, to any particular type of turn channeling machine.

It will be clear to those skilled in this class of machines and with the general objeots of the present invention in view, that changes may be made in the details of structure, the described and illustrated embodi ment thereof being intended as an eXploitation of its underlying essentials the features whereof are definitely stated in their true scope in the appended claims.

Vhat is claimed as new, is

1. A channeling machine, having, in combination, means for supporting and feeding a sole,-an edge knife movable toward and from the sole, an edge presser foot movable toward and from the sole independently of the edge knife, means operatively connected to one of said parts for lifting it out of operating position, and a device for operatively connecting said other part to the lifting-means at the will of the operator, substantially as described.

2. A channeling machine, having, in combination, means for supporting and feeding a sole, two parallel, independently mounted, spring pressed slides carrying an edge knife and an edge presser foot respectively, means for lifting one of said slides away from the sole, and an adjustable device carried by the other slide for connecting and disconnecting said slide from said lifting means, substantially as described.

3. A channeling machine, having, in combination, means for supporting and feeding a sole, an edge knife, means for lifting said edge knife out of operating position at the will of the operator, an independently mounted edge presser foot normally unaffected by the knife lifting means, and provision for connecting said foot to the knife lifting means to be lifted with the knife, substantially as described.

41. A channeling machine, having, in combination, means for supporting and feeding a sole, a slide carrying an edge knife, an edge presser foot carried by an independent, yieldingly supported slide, means for lifting the knife slide to Withdraw the knife from the sole, and means operatively connecting the presser foot slide to the knife slide to be lifted simultaneously therewith While permitting the presser foot to yield at all times relatively to the knife, substantially as described.

5. A channeling machine, having, in combination, means for supporting and feeding a sole, a slide having an edge knife mounted at its lower end, a second, independently mounted slide carrying an edge presser foot, a pin projecting from the first slide, means for engaging the under side of said pin and movable to lift the edge knife from the sole, and means carried by the second slide arranged to engage the upper side of said pin at the Will of the operator, thereby causing the foot to be lifted With the knife, substantially as described.

6. A channeling machine, having, in combination, means for supporting and feeding a sole, an edge knife, an independently mounted edge presser foot, and means for lifting said parts from operating position either singly or together, substantially as described.

ADAM H. PRENZEL. Witnesses:

G. W. SHULTZ, L. W. RYAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

